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The Heating & Cooling Blog

By MR. HVAC

Sunlight streaming through a window illuminating dust particles in a dimly lit room.

Why Is My House So Dusty? The HVAC Causes Most Homeowners Miss

May 29, 2026

Heating and cooling equipment moves enormous volumes of air through your home every day. If that system is pulling...

Person removing or installing a white ceiling air vent cover in a home interior.

Weak Air Flow From Vents in House? How to Tell If You Need Duct Cleaning, HVAC Duct Repair, or Something Else

May 27, 2026

Weak air flow from vents in house complaints are among the most common HVAC issues we address for homeowners in...

Hand holding HVAC manifold gauge set with blue and red dials in front of an air conditioning unit outdoor.

Can I Recharge My Own Air Conditioner?

May 22, 2026

The short answer is no, not legally and not safely. While you can buy DIY AC recharge kits online,...

Close-up of a person wearing a tool belt holding a cordless drill near a wooden wall.

How Often Should HVAC Systems Be Serviced?

May 19, 2026

Air conditioning systems should be inspected twice a year, in spring before cooling season, and heating systems...

Industrial HVAC air handling unit suspended from ceiling with exposed copper pipes and ductwork in building.

Aux Heat vs. Emergency Heat: What's the Difference on a Heat Pump?

May 11, 2026

If you have a heat pump, you have probably seen AUX HEAT or EM HEAT flash on your thermostat at some point during a...

Close-up of a Tekton screwdriver and screws on a metallic surface in a workshop or industrial setting.

Furnace Exhaust Pipe: What Does it Do? Warning Signs of Failure

May 07, 2026

Your furnace exhaust pipe does one job: safely carry combustion gases out of your home. When it works, you never...

Technician repairing and wiring components inside an outdoor air conditioning unit with visible copper pipes and wires.

Dirty Evaporator Coil: Symptoms, Causes, and What to Do Next

May 05, 2026

Your air conditioner runs, the thermostat is set correctly, and the filter is reasonably clean. But the house still...

Technician using a wrench to repair or maintain an open boiler or furnace with visible pipes and wiring.

Furnace Control Board: What It Does and Signs It's Failing

April 30, 2026

Most furnace problems come down to one of a handful of familiar parts: the igniter, the flame sensor, the pressure...

Residential air conditioning unit with refrigerant tank and pressure gauges installed outside house near grass and fence.

What is a Home AC Freon Recharge?

April 27, 2026

Your AC is running, but the air drifting out of the vents feels lukewarm at best. Before you panic and start pricing...

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